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‘A tribute to Dr J. Rogge’ aims to systematically review muscle activity and muscle fatigue during sustained submaximal quasi-isometric knee extension exercise (hiking) related to Olympic dinghy sailing as a tribute to Dr Rogge’s merits in the world of sports. Dr Jacques Rogge is not only the former President of the International Olympic Committee, he was also an orthopaedic surgeon and a keen sailor, competing at three Olympic Games. In 1972, in fulfilment of the requirements for the degree of Master in Sports Medicine, he was the first who studied a sailors’ muscle activity by means of invasive needle electromyography (EMG) during a specific sailing technique (hiking) on a self-constructed sailing ergometer. Hiking is a bilateral and multi-joint submaximal quasi-isometric movement which dinghy sailors use to optimize boat speed and to prevent the boat from capsizing. Large stresses are generated in the anterior muscles that cross the knee and hip joint, mainly employing the quadriceps at an intensity of 30–40% maximal voluntary contraction (MVC), sometimes exceeding 100% MVC. Better sailing level is partially determined by a lower rate of neuromuscular fatigue during hiking and for ≈60% predicted by a higher maximal isometric quadriceps strength. Although useful in exercise testing, prediction of hiking endurance capacity based on the changes in surface EMG in thigh and trunk muscles during a hiking maintenance task is not reliable. This could probably be explained by the varying exercise intensity and joint angles, and the great number of muscles and joints involved in hiking.

Highlights

  • Dr Jacques Rogge, former president of the International Olympic Committee and Olympic Finn sailor, was the first to study muscle activity during sailing using invasive needle EMG to obtain his Master degree in Sports Medicine at the Ghent University.

  • Hiking is a critical bilateral and multi-joint movement during dinghy racing, accounting for >60% of the total upwind leg time. Hiking generates large stresses in the anterior muscles that cross the knee and hip joint.

  • Hiking is considered as a quasi-isometric bilateral knee extension exercise. Muscle activity measurements during sailing, recorded by means of EMG, show a mean contraction intensity of 30-40% maximal voluntary contraction with peaks exceeding 100%.

  • Hiking performance is strongly related to the development of neuromuscular fatigue in the quadriceps muscle. Since maximal strength is an important determinant of neuromuscular fatigue during hiking, combined strength and endurance training should be incorporated in the training program of dinghy sailors.

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Software engineering education can be viewed as a challenging task. Computer science students tend to focus on the programming aspects of a project, and take a “hacking approach” to completing a project, rather than viewing the process. Our course material includes teaching the Personal Software Process (PSP). Students are required to produce defect and effort metrics, as well as project summary reports. Tools to assist information recording and production of reports are difficult for students to access. The cost in terms of financial and learning time is usually too high at the educational level to justify using commercial tools that are available for the professional software engineer. We have developed a tool—Personal Assistant for Software Engineers—to aid students in the learning of the PSP. The tool has been successfully used in four subjects for a semester. Following feedback and evaluation, it has been redesigned, and is currently in stage two. The tool has been useful for students, and has automated the previous manual process of producing time and defect reports, along with project summaries, thus allowing them to focus on the meaning of the information.  相似文献   
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Viewing a hostile media bias against one’s group (e.g., political party) is a perceptual effect of media use. When it comes to the portrayal of political parties in the United States, prior research suggests that both Democrats and Republicans see mainstream media coverage as favoring the other side, regardless of the orientation of the political news coverage. Although prior research has not identified all factors that make this perceptual bias more likely, or at explaining how or why this perceptual effect occurs, we do know that it is related to one’s group identity. In this study, we examined salient predictors of hostile media bias during the 2012 presidential campaign. Individual (i.e., political cynicism) and group identity related (i.e., group status, intergroup bias, political ideology) differences of media users predicted such perceptions. But, the medium selected for political information about the campaign also mattered. The use of two media in particular—TV and social networking sites—appear to have blunted hostile media bias perceptions, whereas the use of two other media—radio and video sharing sites—appear to have accentuated perceptions that the media were biased against one’s party  相似文献   
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我们常常会为那些动人的爱情故事感动得落泪,也常常会感慨生活的造化弄人。其实爱情,不仅仅只限于人类,天鹅从一而终的绝唱的令人唏嘘。本文的两只可爱的小鸟,也向我们展示了爱情美好而动人的一面。  相似文献   
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In Third World countries a key to the course of nation-building is the modernization of the organizational and administrative infrastructures which drive the development process. Increasing the operational capabilities, effectiveness, and efficiency of the ministry of education, and hence the quality and quantity of school outcomes, is typically a high priority item in the development plans of a nation. In order to promote the modernization of management activities in ministries, however, it is first essential to understand their existing patterns of operation. Toward this objective, the paper presents a methodological framework for a field study approach to the examination of the working of a ministry of education in Latin America. Several issues are introduced which influence the process of inquiry, such as: (1) examining the impact of historical traditions on contemporary management procedures; (2) exploring concerns for ethics and academic colonialism; (3) distinguishing between anthropological and sociological participant-observation field methods; (4) gathering and analyzing data on complex ministries; and (5) exploring the task of Third World theory building.
Zusammenfassung Einen Schlüssel zum Verlauf des nationalen Aufbaus in der dritten Welt liefert die Modernisierung der organisatorischen und administrativen Infrastrukturen, die den Entwicklungsprozess vorantreiben. Im allgemeinen wird der Verbesserung der Handels-Fähigkeiten, der Wirksamkeit und Effizienz des Bildungsministeriums eine hohe Priorität in den Entwicklungsplänen eines Landes beigemessen. Um jedoch die Modernisierung der Führungsarbeit von Ministerien beschleunigen zu können, müssen zunächst ihre jetzigen Operationsweisen untersucht werden. Zu diesem Zweck wird in diesem Artikel ein methodologischer Rahmen für einen Feldstudienansatz zur Prüfung der Arbeit eines Bildungsministeriums in einem lateinamerikanischen Staat vorgelegt. Verschiedene Fragen, die den Untersuchungsprozeß beeinflussen, werden erörtert, zum Beispiel; (1) die Auswirkung historischer Traditionen auf derzeitige Leitungsverfahren; (2) Grad der Beachtung von Ethik und akademischem Kolonialismus; (3) Unterschied zwischen anthropologischen und soziologischen Methoden zur Beobachtung von Beteiligten in der Praxis; (4) Sammlung und Analyse von Daten über komplexe Ministerien; und (5) die Aufgabe, in der dritten Welt eine Theorie aufzubauen.

Résumé L'un des éléments essentiels de la course à l'intégration nationale, dans les pays du Tiers Monde, est la modernisation des infrastructures administratives et organiques qui guident le processus du développement. L'une des premières priorités à respecter est typiquement le développement des moyens d'action, de la compétence et de l'efficacité du ministère de l'éducation, et par voie de conséquence, la qualité et l'importance des résultats scolaires. Toutefois, afin de moderniser judicieusement les activités du management dans les ministères de l'éducation, il est primordial de comprendre leur mode actuel de travail. Ayant cet objectif en vue, l'auteur de cet article propose un cadre méthodologique permettant d'aborder sur le terrain l'examen du fonctionnement d'un ministère de l'éducation en Amérique Latine. Il expose plusieurs démarches qui influent sur le processus de l'enquête: (1) examiner l'impact des traditions historiques sur les procédés contemporains du management; (2) déterminer les préoccupations relatives à l'éthique et au colonialisme académique; (3) faire la distinction entre les méthodes anthropologiques et sociologiques de l'observation participante sur le terrain; (4) rassembler et analyser les données concernant les ministères complexes; et (5) explorer la tâche de l'élaboration de théories relatives au Tiers Monde.
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Balancing self-care and other-care is often a struggle for career counselors and others in the helping professions. The process of caring is made up of a constant series of empathic attachments, active involvements, and felt separations. The ability to continually engage in the caring cycle is important for success. However, the constant need to re-create the cycle of caring can lead to counselor depletion and burnout. This article provides a developmental framework for assisting career counselors to avoid depleted caring while prolonging their professional longevity. The model of self-care includes recognizing the hazards of high touch work, such as limited resources and constant one-way caring. Also addressed are specific means of professional and personal sustenance, such as maximizing experiences of professional success and balancing personal wellness throughout one's career.  相似文献   
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